
// 获取盒子到屏幕上方的距离
export const getAbsTop = (element) => {
  const rect = element.getBoundingClientRect();
  const scrollTop = document.documentElement.scrollTop;
  const clientTop = document.documentElement.clientTop || 0;

  return rect.top + scrollTop - clientTop;
}

// 获取盒子到屏幕左方的距离
export const getAbsLeft = (element) => {
  const rect = element.getBoundingClientRect();
  const scrollLeft = document.documentElement.scrollLeft;
  const clientLeft = document.documentElement.clientLeft || 0;

  return rect.left + scrollLeft - clientLeft;
}

export const generateUUID = () => {
  let d = new Date().getTime();
  if (window.performance && typeof window.performance.now === "function") {
    d += performance.now(); //use high-precision timer if available
  }
  let uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
    let r = (d + Math.random() * 16) % 16 | 0;
    d = Math.floor(d / 16);
    return (c == 'x' ? r : (r & 0x3 | 0x8)).toString(16);
  });
  return uuid;
}